Design and Characterization of 50W Switch Mode Power Supply Using Normally-On SiC JFET
The 50W Quasi-resonant mode SMPS which adopted a normally-on-type SiC JFET as a switch has been designed and characterized. A simple decision circuit and an auxiliary power supply was utilized to safely protect the JFET from an in-rush current at initial operation stage and to provide sufficient negative voltage for a complete JFET drive. Even without a refine engineering, the SMPS showed 96% efficiency at a full load state.
Anton J. Bauer, Peter Friedrichs, Michael Krieger, Gerhard Pensl, Roland Rupp and Thomas Seyller
I. H. Kang et al., "Design and Characterization of 50W Switch Mode Power Supply Using Normally-On SiC JFET", Materials Science Forum, Vols. 645-648, pp. 1151-1154, 2010